The treatment for astrocytoma depends on the type, size, and location of the tumor. Treatment options may include surgery, radiation therapy, chemotherapy, and targeted therapy. Surgery is the most common treatment for astrocytoma and is used to remove as much of the tumor as possible. Radiation therapy is used to kill any remaining cancer cells after surgery. Chemotherapy is used to kill cancer cells that may have spread to other parts of the body. Targeted therapy is a newer type of treatment that uses drugs to target specific molecules in cancer cells.